Apparatus

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sensors Mode-S transponder

4247D1

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to VP-CIX · BOEING 737 MAX 8

Hex
4247D1
Octal
20443721
Decimal
4,343,761
Country
GB
Tail
VP-CIX
Type
B38M
No current signal · last broadcast 2d ago
Flights observed
139
Distinct callsigns
19
Country
GB
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 4247D1.

Country allocation

The ICAO 24-bit address 4247D1 falls within the block assigned to United Kingdom (GB) by ICAO Annex 10, Volume III. Every aircraft registered in United Kingdom receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 19 distinct

Callsign Airline Flights Last seen
CAY202 - 14 2026-07-06
CAY794 Cayman Airways 13 2026-05-17
CAY203 - 12 2026-07-06
CAY441 - 11 2026-07-11
CAY440 - 11 2026-07-11
CAY200 - 11 2026-07-04
CAY795 Cayman Airways 10 2026-05-17
CAY104 Cayman Airways 10 2026-06-16
CAY102 - 9 2026-07-10
CAY103 - 6 2026-07-10
CAY852 Cayman Airways 5 2026-06-01
CAY331 - 5 2026-07-12
CAY201 - 5 2026-07-03
CAY106 - 5 2026-06-19
CAY107 - 4 2026-07-13
CAY105 Cayman Airways 4 2026-06-16
CAY330 - 2 2026-07-05
CAY793 Cayman Airways 1 2026-05-28
CAY792 Cayman Airways 1 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CAY107 - Jul 13, 02:01 UTCJul 13, 02:30 UTC30m
2026-07-12 CAY331 - Jul 12, 18:20 UTCJul 12, 23:55 UTC5h 35m
2026-07-11 CAY441 - Jul 11, 20:20 UTCJul 12, 16:05 UTC19h 45m
2026-07-11 CAY441 DEN → AUS Jul 11, 19:55 UTCJul 12, 16:05 UTC20h 10m
2026-07-11 CAY440 - Jul 11, 14:00 UTCJul 11, 17:35 UTC3h 35m
2026-07-10 CAY103 - Jul 10, 15:20 UTCJul 11, 14:15 UTC22h 55m
2026-07-10 CAY102 - Jul 10, 13:00 UTCJul 10, 13:35 UTC35m
2026-07-06 CAY203 - Jul 6, 21:15 UTCJul 6, 22:00 UTC45m
2026-07-06 CAY202 - Jul 6, 16:00 UTCJul 6, 20:00 UTC4h 0m
2026-07-05 CAY331 - Jul 5, 21:50 UTCJul 6, 13:55 UTC16h 5m
2026-07-05 CAY330 - Jul 5, 13:55 UTCJul 5, 16:05 UTC2h 10m
2026-07-04 CAY330 TPA → AUS Jul 4, 19:25 UTCJul 5, 16:05 UTC20h 40m
2026-07-04 CAY200 - Jul 4, 17:25 UTCJul 4, 18:20 UTC55m
2026-07-03 CAY200 - Jul 3, 20:20 UTCJul 4, 18:20 UTC22h 0m
2026-07-03 CAY201 - Jul 3, 20:10 UTCJul 4, 18:15 UTC22h 5m
2026-07-03 CAY200 - Jul 3, 17:25 UTCJul 3, 18:40 UTC1h 15m
2026-07-02 CAY200 TPA → TPA Jul 2, 20:45 UTCJul 3, 18:40 UTC21h 55m
2026-07-02 CAY202 - Jul 2, 15:25 UTCJul 2, 19:25 UTC4h 0m
2026-07-02 CAY102 - Jul 2, 13:00 UTCJul 2, 13:30 UTC30m
2026-06-29 CAY107 - Jun 29, 02:09 UTCJun 29, 02:39 UTC30m
2026-06-28 CAY331 - Jun 28, 18:34 UTCJun 29, 00:20 UTC5h 45m
2026-06-27 CAY441 DEN → AUS Jun 27, 22:40 UTCJun 28, 16:05 UTC17h 25m
2026-06-27 CAY440 GCM → DEN Jun 27, 16:24 UTCJun 27, 19:55 UTC3h 30m
2026-06-26 CAY103 MIA → GCM Jun 26, 15:49 UTCJun 26, 16:09 UTC20m
2026-06-25 CAY102 GCM → MIA Jun 25, 17:25 UTCJun 26, 13:45 UTC20h 20m
2026-06-22 CAY203 - Jun 22, 22:19 UTCJun 22, 23:10 UTC50m
2026-06-22 CAY202 GCM → TPA Jun 22, 15:24 UTCJun 22, 20:39 UTC5h 15m
2026-06-22 CAY107 - Jun 22, 01:29 UTCJun 22, 13:19 UTC11h 50m
2026-06-21 CAY331 AUS → GCM Jun 21, 18:10 UTCJun 21, 23:24 UTC5h 15m
2026-06-20 CAY441 DEN → GCM Jun 20, 20:09 UTCJun 21, 16:04 UTC19h 55m
2026-06-20 CAY440 GCM → DEN Jun 20, 01:24 UTCJun 20, 17:44 UTC16h 20m
2026-06-19 CAY106 - Jun 19, 22:19 UTCJun 19, 22:55 UTC35m
2026-06-18 CAY203 TPA → GCM Jun 18, 21:15 UTCJun 18, 22:05 UTC50m
2026-06-18 CAY202 GCM → TPA Jun 18, 15:55 UTCJun 18, 20:00 UTC4h 5m
2026-06-18 CAY102 GCM → MIA Jun 18, 13:05 UTCJun 18, 13:40 UTC35m
2026-06-16 CAY105 MIA → GCM Jun 16, 20:15 UTCJun 16, 20:40 UTC25m
2026-06-16 CAY104 GCM → MIA Jun 16, 17:24 UTCJun 16, 17:59 UTC35m
2026-06-15 CAY107 - Jun 15, 01:40 UTCJun 15, 02:04 UTC25m
2026-06-14 CAY331 AUS → GCM Jun 14, 18:10 UTCJun 14, 23:50 UTC5h 40m
2026-06-13 CAY441 DEN → GCM Jun 13, 20:30 UTCJun 14, 15:55 UTC19h 26m
2026-06-13 CAY440 GCM → DEN Jun 13, 01:00 UTCJun 13, 18:10 UTC17h 9m
2026-06-12 CAY106 GCM → MIA Jun 12, 22:30 UTCJun 12, 23:00 UTC30m
2026-06-11 CAY203 TPA → GCM Jun 11, 21:20 UTCJun 11, 22:10 UTC50m
2026-06-11 CAY202 GCM → TPA Jun 11, 15:30 UTCJun 11, 19:50 UTC4h 20m
2026-06-11 CAY102 GCM → MIA Jun 11, 12:50 UTCJun 11, 13:25 UTC35m
2026-06-09 CAY105 MIA → GCM Jun 9, 20:00 UTCJun 9, 20:35 UTC35m
2026-06-09 CAY104 GCM → MIA Jun 9, 17:40 UTCJun 9, 18:20 UTC40m
2026-06-08 CAY203 TPA → GCM Jun 8, 21:15 UTCJun 9, 18:20 UTC21h 5m
2026-06-08 CAY202 GCM → TPA Jun 8, 15:20 UTCJun 8, 19:45 UTC4h 25m
2026-06-07 CAY203 TPA → GCM Jun 7, 20:50 UTCJun 8, 13:20 UTC16h 30m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the VP-CIX page for operator, model, and routing details .

Mode-S 4247D1 frequently asked

What is Mode-S code 4247D1?
4247D1 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to VP-CIX.
Where is Mode-S 4247D1 registered?
Mode-S code 4247D1 is allocated to United Kingdom (GB). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4247D1 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4247D1, octal 20443721, decimal 4,343,761.
What flights does 4247D1 operate?
Mode-S 4247D1 has broadcast 19 distinct callsigns, including CAY202, CAY794, CAY203, CAY441, CAY440.